Window sash extrusion



FIG. 1 is a perspective view of the window sash extrusion;

FIG. 2 is a left side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a bottom view thereof. 

CLAIM The ornamental design for window sash extrusion, as shown and described. 